I am trying to read the camera image on Jetson Xavier (ubuntu 18). I am facing a problem. When I run the following code it gives a warning and gives a black (full) image. [ WARN:0] global /home/nvidia/host/build_opencv/nv_opencv/modules/videoio/src/cap_gstreamer.cpp (933) open OpenCV | GStreamer wa…

Sorry I missed that, but you need to use waitKey after imshow for opencv drawing thread to be scheduled: if cap.isOpened(): cv2.namedWindow("demo", cv2.WINDOW_AUTOSIZE) while True: ret_val, img = cap.read(); if not ret_val: break …

[image] imranhassan84: gstr = 'varguscamerasrc There is a typo here, it lacks the leading ‘n’. Also, you may tell what camera model you are using. If using a RPi v2 cam, you may use 30 fps with 1080p: gstr = 'nvarguscamerasrc ! video/x-raw(memory:NVMM), width=1920, height=1080, format=NV12,…

Oh sorry . It was copy paste mistake. In actual code it is correct. Problem is still same

I used the method and find this ioctl: VIDIOC_ENUM_FMT Index : 0 Type : Video Capture Pixel Format: 'MJPG' (compressed) Name : Motion-JPEG Size: Discrete 1920x1080 Interval: Discrete 0.017s (60.000 fps) Interval: Discrete 0.033s (30.000 fps) Size: Discrete 640x480 …

nvarguscamerasrc is for bayer sensors connected with CSI. If using a USB cam, you would use v4l2src instead. First try with a low resolution * fps. The following should display your camera feed in a X window: gst-launch-1.0 -v v4l2src device=/dev/video0 ! video/x-raw,format=YUY2,width=640,height=…

[image] Honey_Patouceul: gst-launch-1.0 -v v4l2src device=/dev/video0 ! video/x-raw,format=YUY2,width=640,height=480,framerate=30/1 ! xvimagesink This working perfectly fine and getting image … but using openCV again getting black image. What is problem with opencv.

[image] Honey_Patouceul: if cap.isOpened(): cv2.namedWindow("demo", cv2.WINDOW_AUTOSIZE) while True: ret_val, img = cap.read(); if not ret_val: break cv2.imshow('demo',img) if cv2.waitKey(1) == ord('q'): …

@Honey_Patouceul My solution was working perfectly fine with all possible resolutions and fps but suddenly it stopped working. The thing I did is I installed SSD NVMe. When I use this command I get error gst-launch-1.0 -v v4l2src device=/dev/video0 ! video/x-raw,format=YUY2,width=640,height=480,f…

Hi, Please check if you can run this gst-launch-1.0 command: gst-launch-1.0 -v v4l2src device=/dev/video0 ! video/x-raw,format=YUY2,width=640,height=480,framerate=30/1 ! videoconvert ! video/x-raw,format=BGR ! fakesink If yes, please apply this pipeline: v4l2src device=/dev/video0 ! video/x-raw,…

Python OpenCV video capture problem

Robotics & Edge Computing Jetson Systems Jetson Xavier NX

DaneLLL April 20, 2021, 3:28am 4

Hi,
Please try Honey_Patouceul’s suggestion. If you use USB cameras, may refer to
Jetson Nano FAQ
Q: I have a USB camera. How can I launch it on Jetson Nano?

Topic		Replies	Views
Python OpenCV video capture problem using gstreamer Jetson AGX Xavier gstreamer	18	5821	October 3, 2021
Opencv streaming issue Jetson Xavier NX camera , opencv , gstreamer	19	2708	October 18, 2021
Opencv videocapture can not access camera Jetson Xavier NX opencv	2	1116	October 18, 2021
Streaming an openCV capture with gstreamer in Python Jetson AGX Xavier opencv , gstreamer	17	5292	October 18, 2021
USB Camera can't be used by opencv+gstreamer Jetson AGX Xavier	7	1753	October 18, 2021
Gstreamer Warning - pipeline have not been created - OpenCV2 DeepStream SDK opencv , gstreamer	4	13102	October 12, 2021
OpenCV2 VideoCapture issues Jetson Nano	5	17474	October 14, 2021
OpenCV VideoCapture is not wokring Jetson AGX Orin opencv	12	2940	October 11, 2023
Problems with opencv2 Jetson Xavier NX camera , python	7	124	February 7, 2026
OpenCV error Jetson Nano camera , opencv , jetson-inference , gstreamer , python	18	9570	October 15, 2021

Python OpenCV video capture problem

Related topics